Auxiliary Power Conversion Unit for Welding Systems
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Solution Overview
Problem
Existing welding power systems require auxiliary power for tools like lights and hand grinders, which often necessitate the use of extension cords, leading to power losses, cable clutter, and inefficiencies due to misplacement, borrowing, and theft.
Innovation Solution
An auxiliary power conversion unit that can output DC and AC power at multiple voltages, capable of drawing power from the arc potential via an electrode and work cable, allowing for remote location and integration into welding systems or as a stand-alone device, with control and processing electronics for efficient power management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If extension cords are used to provide auxiliary power at the welding location, then auxiliary power can be delivered to tools, but power losses occur due to long distance transmission
Solution Approach 1:
The system divides the power delivery function into two separate units: a welding power source that generates power and a power conversion unit that converts and delivers auxiliary power locally. This segmentation allows the auxiliary power to be converted at the welding location rather than transmitted through extension cords, eliminating transmission losses while maintaining the ability to power auxiliary tools.
Solution Approach 2:
The power conversion unit acts as an intermediary device between the welding power source and auxiliary tools. It receives power from the welding power source via welding cables, converts the welding output to appropriate auxiliary voltages, and delivers power locally. This intermediary approach eliminates the need for extension cords and associated power losses.
2Ease of operation
If extension cords are used to provide auxiliary power, then tools can be powered remotely, but cable clutter increases in the weld area
Solution Approach 1:
The system merges the auxiliary power delivery function with the existing welding cable infrastructure. The power conversion unit connects to the welding power source using the same welding cables that are already present in the weld area, eliminating the need for separate extension cords. This merging reduces cable clutter while maintaining remote tool power capability.
Solution Approach 2:
The welding cables serve multiple functions: they deliver welding power to the workpiece and simultaneously provide power to the power conversion unit for auxiliary tool operation. This multi-functionality eliminates the need for dedicated extension cords, reducing cable clutter in the weld area.
3Ease of operation
If extension cords are used for auxiliary power, then power can be transmitted to the weld location, but inefficiencies result from misplacement, borrowing, and theft
Solution Approach 1:
The power conversion unit is designed to be permanently or semi-permanently positioned at the welding location and automatically receives power through the welding cables during welding operations. It serves itself by converting power locally without requiring manual setup or management of extension cords, eliminating issues related to misplacement, borrowing, and theft.
Solution Approach 2:
The system extracts the auxiliary power conversion function from the welding power source itself and places it at the welding location. This extraction creates a self-contained unit that operates independently during welding, eliminating the need for removable extension cords that are susceptible to misplacement, borrowing, and theft.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Reduces the need for extension cords, minimizes cable clutter, and enhances efficiency by providing auxiliary power directly at the welding location, improving operational convenience and reducing power losses.
Implementation Method 1
The power conversion unit is capable of drawing power from an arc potential via an electrode cable and a work cable
Data Source
AI summary
Systems and methods to convert welding power to auxiliary power are disclosed. An example power conversion system includes: power conversion circuitry configured to convert an input voltage from a welding power supply unit to a second output to power an auxiliary load, the power conversion circuitry comprising: an input power converter configured to receive the input voltage from the welding power supply unit; an input-to-output isolation circuit configured to maintain the auxiliary load at a different potential than the welding power supply unit; and an output power converter configured to output power having a target frequency and a target waveform to the auxiliary load; and a processor configured to control the output of the power conversion circuitry based on feedback associated with power requirements at the auxiliary load.